Third line: oxaliplatin plus capecitabine oxaliplatin 130 mg/m2 IV infusion on day 1 and capecitabine 1000 mg/m2 orally b.i.d. on day 1-14. This schedule will be continued until progression or unacceptable toxicity. Continuation after 6 months without disease progression and/or severe toxicity at the investigator's discretion.